One Man Ran 30,303 Kilometers in 444 Days. Here’s What It Did to His Body.

Researchers tracked one runner’s blood, muscles, organs, and mind through an unprecedented 444-day challenge—and what they found complicates the idea that finishing means recovering.

Run Long Run Healthy

What Decades of Running Does to Men’s Testosterone

A new study compared hormone patterns in lifelong runners and sedentary men across two age groups — and the results aren’t as simple as “more training, more testosterone.

Run Long Run Healthy

Can Zapping Your Brain Make You Run Faster?

Researchers stimulated runners’ brains before 3,000-meter time trials to see if targeting motor and cognitive control could boost performance — the results say more about pacing than raw speed.

Run Long Run Healthy

Does Swishing a Sports Drink Actually Make You Run Faster?

A new meta-analysis tested carbohydrate, caffeine, and menthol mouth rinses across 57 studies — and the results depend a lot on what you’re measuring.

Run Long Run Healthy

Kenenisa Bekele Pulls Out of the Berlin Marathon a Week After Joining the Field

The 44-year-old injured his left Achilles tendon late in his buildup, organizers said Thursday. His last completed marathon was at the Paris Olympics two years ago.

Elite Runners

Mizuno Unveils 96 Gram Racing Shoe, Lighter Than Adidas’ World Record Shoe

The carbon-plated racer goes on sale Dec. 4 for ¥88,000 ($554) in Japan and weighs about 96 grams in a men’s U.S. 9, one gram off Adidas’ figure for the Adizero Adios Pro Evo 3.

Jessy Carveth

Marathon Handbook 1
Marathon Handbook 2

Caffeine Really Does Help You Burn More Fat—New Study Confirms It

A new double-blind study put caffeine’s fat-burning reputation to the test in real-world running conditions—and the results held up.

Run Long Run Healthy

Marathon Handbook 3

Italy’s Luca Del Pero and Poland’s Patrycja Stanek Win Skyrunning World Titles on La Gomera

Del Pero came from sixth to win the 29K SKY race and the combined title two days after taking bronze in the vertical. Stanek won by 36 seconds in her first senior world championship.

Trail and Ultras

Marathon Handbook 4

Do Supershoes Help Women More Than Men? A New Study Says Yes

Women’s road racing records are being erased at a stunning rate since supershoes arrived—researchers used throwing events as a control to prove why.

Run Long Run Healthy

The World’s Biggest Running Newsletter

Marathon Handbook 5

384,313 runners and counting.

Join the world’s biggest running newsletter, and wake up every day to the latest running stories, tips, reviews, and more:

    Our Podcasts

    Expert Coach Advice By Distance

    We Help You Run Your Best

    Running Tips

    Calculators

    Training Plans

    Cross Training

    Injury

    Nutrition

    The Latest On YouTube: